Benchmark: Test script - MeasureThat.net

Script Preparation code:

var arrayLength = 1000;

Tests:

makeArray with Length
var arr = Array(arrayLength) arr.forEach((v,i) => { arr[i] = i; })
Push Array
var arr = [] for (let i = 0; i < arrayLength; i++) { arr[i] = i; }
Make Array use Array from
var arr = Array.from(arrayLength, () => {return null}) arr.forEach((v,i) => { arr[i] = i; })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
makeArray with Length
Push Array
Make Array use Array from

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark data and explain what's being tested, compared, and the pros and cons of each approach.

**Benchmark Definition**
The `benchmark definition` is a JSON object that contains information about the script to be executed for this test case. It has four properties:

*   `Name`: The name of the test.
*   `Description`: A brief description of the test (in Korean, in this case).
*   `Script Preparation Code`: A code snippet that prepares the environment for executing the test script.
*   `Html Preparation Code`: An empty string, indicating no HTML preparation is needed.

**Individual Test Cases**
The `individual test cases` are arrays of objects, each representing a unique test scenario. There are three test cases:

1.  **"makeArray with Length"`**

*   Benchmark Definition: Creates an array using the `Array(arrayLength)` constructor and then uses `forEach()` to populate it with values.
    *   Test Name: "makeArray with Length"

This approach tests how quickly arrays can be created and populated using different methods.

2.  **"Push Array"`**

*   Benchmark Definition: Creates an empty array and then pushes elements onto it using a `for` loop.
    *   Test Name: "Push Array"

This test case examines the performance of pushing elements onto an array.

3.  **"Make Array use Array from"`**

*   Benchmark Definition: Uses `Array.from()` to create an array with a specified length and then uses `forEach()` to populate it.
    *   Test Name: "Make Array use Array from"

This test case measures the performance of using `Array.from()` instead of traditional array creation methods.

**Latest Benchmark Result**
The latest benchmark result is an array of objects, each representing a single test run. There are three results:

1.  **"Make Array use Array from"`**

*   Raw UA String: Browser and device information (e.g., Chrome 121 on Mac OS X 10.15.7).
    *   Executions Per Second: The number of times the benchmark script was executed per second.

This result shows the performance of creating an array using `Array.from()`.

2.  **"makeArray with Length"`**

*   Raw UA String: Browser and device information.
    *   Executions Per Second: The execution rate of this test case.

This result displays the performance of creating arrays using the traditional `Array(arrayLength)` method.

3.  **"Push Array"`**

*   Raw UA String: Browser and device information.
    *   Executions Per Second: The execution rate of this test case.

This result measures the performance of pushing elements onto an array.

**Pros and Cons of Each Approach**
Here are some pros and cons for each approach:

1.  **`Array(arrayLength)`**

*   Pros:
        *   Simple syntax.
        *   Easy to understand and use.
    *   Cons:
        *   May be slower than other methods due to the overhead of creating an array with a specified length.

2.  **`Array.from()`**

*   Pros:
        *   More flexible than traditional array creation methods.
        *   Often faster than `Array(arrayLength)`.
    *   Cons:
        *   Requires JavaScript version 4.8 or higher (not supported in older browsers).

3.  **Push Array**

*   Pros:
        *   Simple syntax and understanding.
    *   Often faster than creating arrays using other methods.
    *   Works well with most browser versions.

**Other Alternatives**
There are additional array creation methods in JavaScript, such as `new Int32Array()` or `new Float64Array()`, which can be used to create typed arrays. These methods may offer better performance for specific use cases but require more knowledge and expertise.

Keep in mind that the best approach will depend on the specific requirements of your project and the compatibility you need with different browsers and environments.

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
makeArray with Length	651843.7 Ops/sec
Push Array	32893.9 Ops/sec
Make Array use Array from	5420620.0 Ops/sec

Related benchmarks:

Test script (version: 0)

테스트

Comparing performance of: makeArray with Length vs Push Array vs Make Array use Array from

Created: 9 months ago by: Guest

Jump to the latest result

makeArray with Length

Push Array

Make Array use Array from

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):